Routes of Drug Administration and their Impact on the Brain

Which route of drug administration is the most specific for targeting a particular part of the brain?

Which route of drug administration is less specific than intracerebral administration but easier to perform?

Which part of the brain can absorb drugs via injection in intracerebroventricular administration?

Which route of administration is the fastest way to get a drug into the blood?

Which route of administration is absorbed by the liver, small intestines, and other abdominal organs?

Which route of administration is a life-saver in medical contexts when oral administration is not possible?

Which route of administration is commonly used to administer vaccines and general medications such as antibacterial shots?

Which route of administration allows a drug to bypass the stomach and enter the bloodstream directly, without being metabolized by the digestive system?

Which route of administration involves the administration of a drug into the rectum and is used when an individual is not capable of swallowing a drug or is vomiting?

Which route of administration is used for animal research purposes and requires invasive surgery to administer drugs into a specific brain area?